DCT域中DC分量上嵌入水印的算法  

Algorithm of Watermarks Embedded in DC Components in DCT

作　　者：程兴国[1] 王襄[2] 曾嵘[2] 

机构地区：[1]襄樊学院,湖北襄樊441053 [2]十堰职业技术学院,湖北十堰442000

出　　处：《现代电子技术》2007年第3期57-59,共3页Modern Electronics Technique

摘　　要：在DCT域中,存在AC,DC两个分量,通常在图像加密过程中,将水印嵌入AC分量,特别是中频系数上。本文从鲁棒性角度出发,通过实验证明,在实际应用中,DC分量比AC分量更适合嵌入水印。DC分量嵌入水印是有效的,且具有很好的鲁棒性,能抵御加在已嵌入水印的图像上的剪切、有损压缩的攻击。In DCT domain,exist AC and DC,the traditional means is to hide watermarking in the AC components,especial ly in the middlefrequency coefficients. From robustness,in actual application, watermarks are embedded in DC components since DC components have much larger perceptual capacity than any AC components. Experimental results demonstrate the strategy, which embeds watermarks in DC components is effective and generated good robustness,and images embedded watermarks can withstand attacks which exerted by tailoring,loss compression.

关 键 词：数字水印 离散余弦变换 鲁棒性 直流分量 交流分量 

分 类 号：TN918[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]